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. Author manuscript; available in PMC: 2014 Jan 1.
Published in final edited form as: Osteoarthritis Cartilage. 2012 Oct 8;21(1):69–76. doi: 10.1016/j.joca.2012.09.011

Fig. 1.

Fig. 1

Sagittal, intermediate-weighted MR images demonstrate progression of a cartilage lesion at the PAT: at baseline (a) a small amount of partial-thickness cartilage loss at the inferior pole of the patella (short arrow) associated with bone marrow edema is seen and at the 12 month-follow-up (b) extensive full-thickness cartilage loss is shown at the same site (long arrow).